diff --git a/.github/DockerfileBackendTests b/.github/DockerfileBackendTests
index 89ef4b79e2..36595d7053 100644
--- a/.github/DockerfileBackendTests
+++ b/.github/DockerfileBackendTests
@@ -41,7 +41,7 @@ RUN apt-get update \
     && rm -rf /var/lib/apt/lists/*
 
 
-RUN wget https://golang.org/dl/go1.19.1.linux-amd64.tar.gz && tar -C /usr/local -xzf go1.19.1.linux-amd64.tar.gz
+RUN wget https://golang.org/dl/go1.21.5.linux-amd64.tar.gz && tar -C /usr/local -xzf go1.21.5.linux-amd64.tar.gz
 ENV PATH="${PATH}:/usr/local/go/bin"
 ENV GO_PATH=/usr/local/go/bin/go
 
diff --git a/Dockerfile b/Dockerfile
index fb6c20eac4..ece9227ad4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -171,13 +171,13 @@ RUN set -eux; \
     arch="$(dpkg --print-architecture)"; arch="${arch##*-}"; \
     case "$arch" in \
     'amd64') \
-    targz='go1.21.0.linux-amd64.tar.gz'; \
+    targz='go1.21.5.linux-amd64.tar.gz'; \
     ;; \
     'arm64') \
-    targz='go1.21.0.linux-arm64.tar.gz'; \
+    targz='go1.21.5.linux-arm64.tar.gz'; \
     ;; \
     'armhf') \
-    targz='go1.21.0.linux-armv6l.tar.gz'; \
+    targz='go1.21.5.linux-armv6l.tar.gz'; \
     ;; \
     *) echo >&2 "error: unsupported architecture '$arch' (likely packaging update needed)"; exit 1 ;; \
     esac; \